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Lithium in a metal-poor Halo Star
This image shows a spectrum of the metal-poor star G271-162 in the red spectral region around the Li-line at 671 nm that is used to derive the lithium isotopic ratio. The wavelengths of the doublet components of the two isotopes are indicated. The total exposure time was 3 hours and the S/N-ratio in the continuum region is above 600 - a most satisfactory result considering that the CCD fringing amplitude is more than 20% at these wavelengths.
Credit:ESO
Over de afbeelding
Id: | eso0013b |
Type: | Kaart |
Publicatiedatum: | 6 april 2000 |
Gerelateerde berichten: | eso0013 |
Grootte: | 800 x 602 px |
Over het object
Kleuren & filters
Band | Telescoop |
---|---|
Optisch R | Very Large Telescope UVES |